It was naturally impossible to defeat the Lord of the Universe with methods he already knew. Since he understood them, he must have cultivated them to a high level. Ling Tian was well aware of this, which was why, after breaking free of the Lord of the Universe's restraints, he had continued cultivating or creating new cultivation techniques and secret arts. Of course, he had also tried refining all kinds of strange energies. Over the years, he had mastered many methods unknown to the Lord of the Universe, such as Devouring the Starry Sky, the Sacred Heart Art, and the Great Thousand Worlds, as well as array patterns and restrictions that combined the Heaven Locking Pillar with other methods. He believed these secret arts gave him a good chance of threatening the Lord of the Universe and dealing him a heavy blow—or even defeating him.
Besides cultivation techniques and secret arts, Ling Tian also had other methods the Lord of the Universe knew nothing about. For instance, he had acquired the Eastern Emperor Bell, a Saint-grade Natal Dan Artifact, and could even use a combined attack secret art with it. Saint-grade Heavenly Treasures such as the Creation Divine Tree could also aid him in battle.
Chang Xiangsi and the others were confident that Ling Tian could use these methods to pose a serious threat to the Lord of the Universe. What worried them was that Ling Tian might not know what methods the Lord of the Universe had at his disposal. In all this time, the Lord of the Universe had used only one or two methods against them: the final tribulation's lightning attacks and a preliminary suppression by his universe. They didn't believe those were all he could do.
It was only natural. It was no exaggeration to say